KR20230149678A - Electrochromic device and manufacturing method thereof - Google Patents

Abstract

Examples include a first substrate; a first transparent electrode disposed on the first substrate; a first discoloring layer disposed on the first transparent electrode; An electrolyte layer disposed on the first discoloration layer; a second discoloration layer disposed on the electrolyte layer; a second transparent electrode disposed on the second discoloration layer; a second substrate disposed on the second transparent electrode; and disposed in a first open area between the third side of the second substrate and the first side of the first substrate, the top surface of the first transparent electrode, the fifth side of the electrolyte layer, and the first side of the second substrate. An electrochromic device is provided including a first sealing portion covering three sides and a portion of the top surface of the second substrate.

Description

Electrochromic device and manufacturing method thereof}

Examples relate to electrochromic devices and methods for manufacturing the same.

Electrochromic film is a film whose color changes due to coloring and decolorization due to oxidation-reduction reactions at each anode and cathode due to an applied potential. It is a film that allows the user to artificially control visible light and infrared light, and is available in a variety of types. Inorganic oxides are used as electrode materials.

Various electrochromic films as described above have been developed and applied for patents. Looking at the contents of the patent applications, Korea Patent Publication No. 2001-0087586 discloses a film in which a conductive indium-tin oxide thin film is deposited on a glass film. MoO3, a reduced color oxide, is deposited on one of the two ITO films (1A, 1B), and WO3, a reduced color oxide, is deposited on the other, and then a lithium-based solid electrolyte, an alkali metal, is deposited on it. Polyaniline, a conductive polymer, is put between the two sheets and passed through a high-frequency compression roller to produce a film that changes from transparent to blue when voltage is applied. In Domestic Registered Utility Model Publication No. 0184841, indium-tinoxide is deposited on a glass film with a thickness of 005 mm. After that, the electrical energy is characterized in that it is combined with a high-frequency roller on both sides of the transition metal oxide film on which WO ₃ , a reduced coloring material, and IrO ₂ , an oxidized coloring material, are deposited with α-PEO copolymer, a polymer solid electrolyte, in between. A discoloring film is known.

The embodiment seeks to provide an electrochromic device with improved durability and a method of manufacturing the same.

An electrochromic device according to an embodiment includes a first substrate; a first transparent electrode disposed on the first substrate; a first discoloring layer disposed on the first transparent electrode; An electrolyte layer disposed on the first discoloration layer; a second discoloration layer disposed on the electrolyte layer; a second transparent electrode disposed on the second discoloration layer; a second substrate disposed on the second transparent electrode; and disposed in a first open area between the third side of the second substrate and the first side of the first substrate, the top surface of the first transparent electrode, the fifth side of the electrolyte layer, and the first side of the second substrate. It includes a first sealing portion covering three sides and a portion of the top surface of the second substrate.

In one embodiment, the first sealing part may further include a first flattening part having a step difference from the upper surface of the second substrate.

In one embodiment, the first sealing part may include a first body disposed in the first open area and a first extension part extending from the first body to the upper surface of the second substrate.

In one embodiment, the first substrate includes a second side opposite the first side, the second substrate includes a fourth side opposite the third side, and the second side and the A second open area is formed between the fourth side, and is disposed in the second open area, the lower surface of the second transparent electrode, the sixth side of the electrolyte layer, the second side, and the lower surface of the first substrate. It may further include a second seal that partially covers the surface.

In one embodiment, the second sealing part may further include a second flattening part having a level difference from the lower surface of the first substrate.

In one embodiment, the second sealing part may include a second body disposed in the second open area and a second extension part extending from the second body to the lower surface of the first substrate.

The electrochromic device according to one embodiment may further include a first barrier layer disposed on the first planarization part.

The electrochromic device according to one embodiment may further include a second barrier layer disposed below the second planarization part.

The electrochromic device according to one embodiment further includes a first bus bar electrically connected to the first transparent electrode layer, and the first sealing part may cover the first bus bar.

The electrochromic device according to one embodiment further includes a second bus bar electrically connected to the second transparent electrode layer, and the second sealing part may cover the second bus bar.

A method of manufacturing an electrochromic device according to an embodiment includes forming a first transparent electrode on a first substrate; forming a first discoloring layer on the first transparent electrode layer; forming an electrolyte layer on the first discoloration layer; forming a second transparent electrode on a second substrate; forming a second discoloring layer on the second transparent electrode; Disposing the second discoloring layer on the electrolyte layer, and laminating the second substrate, the second transparent electrode, and the second discoloring layer to the electrolyte layer; forming a first open area by removing a portion of the second substrate, a portion of the second transparent electrode, a portion of the second discoloration layer, a portion of the electrolyte layer, and a portion of the first discoloration layer; disposing a first curable resin in the first open area; Planarizing the first curable resin; and curing the first curable resin.

A method of manufacturing an electrochromic device according to an embodiment includes removing a portion of the first substrate, a portion of the first transparent electrode, a portion of the first color-changing layer, a portion of the electrolyte layer, and a portion of the second color-changing layer. forming a second open area; disposing a second curable resin in the second open area; planarizing the second curable resin; And it may further include curing the second curable resin.

The electrochromic device according to the embodiment includes a first sealing portion disposed in a first open area where the second substrate, the second transparent electrode, and the electrolyte layer are removed and the upper surface of the first transparent electrode is opened.

Accordingly, the first sealing portion is disposed on the third side of the second substrate, the side of the second transparent electrode, the side of the second color changing layer, the side of the electrolyte layer, and the side of the first color changing layer, It may be adhered to the top surface of the first transparent electrode. Additionally, the first sealing portion may be adhered to a third side of the second substrate, a side of the second transparent electrode, a side of the second discoloration layer, a side of the electrolyte layer, and a side of the first discoloration layer. . Additionally, the first sealing portion may be adhered to a portion of the upper surface of the second substrate.

Accordingly, the first sealing portion can be disposed over a large area and adhered to a large area. Accordingly, the first sealing portion is formed on the upper surface of the first transparent electrode, the third side of the second substrate, the side of the second transparent electrode, the side of the second discoloration layer, the side of the electrolyte layer, and the first It can be firmly adhered to the side of the color change layer and a portion of the top surface of the second substrate. In addition, the first sealing portion includes the upper surface of the first transparent electrode, the third side of the second substrate, the side of the second transparent electrode, the side of the second discoloration layer, the side of the electrolyte layer, and the first discoloration layer. It can be firmly adhered to the side of the layer and a portion of the top surface of the second substrate.

Accordingly, the first sealing portion can efficiently suppress oxygen and moisture penetrating from the side.

Likewise, the second sealing part may be disposed in a second open area where the first substrate, the first transparent electrode, and the electrolyte layer are removed and the lower surface of the second transparent electrode is opened.

Additionally, the second sealing portion may be adhered to a second side of the first substrate, a side of the first transparent electrode, a side of the first discoloration layer, a side of the electrolyte layer, and a side of the second discoloration layer. . Additionally, the second sealing portion may be attached to a portion of the lower surface of the first substrate.

Accordingly, the second sealing portion can efficiently suppress oxygen and moisture penetrating from the side.

Therefore, the electrochromic device according to the embodiment can block the inflow of oxygen and moisture from the outside and efficiently protect the first color change layer, the electrolyte layer, and the second color change layer.

Additionally, the first substrate and the second substrate are flexible, and the electrochromic device according to the embodiment can be bent. At this time, since the first sealing part and the second sealing part are strongly adhered to each side, the electrochromic device according to the embodiment can prevent peeling or gap opening of the first sealing part and the second sealing part. there is.

The electrochromic device according to the embodiment may have improved durability.

1 is a plan view showing an electrochromic device according to an embodiment.
FIG. 2 is a cross-sectional view taken along line A-A' in FIG. 1.
Figure 3 is an enlarged cross-sectional view of the first extension part.
Figure 4 is an enlarged cross-sectional view of the second extension part.
Figure 5 is a cross-sectional view showing a cross-section of an electrochromic device according to another embodiment.
Figures 6 to 13 are cross-sectional views showing the process of manufacturing an electrochromic device according to an embodiment.
Figure 14 is a cross-sectional view showing an electrochromic device according to another embodiment.
Figure 15 is a cross-sectional view showing an electrochromic device according to another embodiment.

In the description of the embodiment, when each part, surface, layer, or substrate is described as being formed “on” or “under” each part, surface, layer, or substrate, “On” and “under” include those formed “directly” or “indirectly” through other components. In addition, the standards for the top or bottom of each component are explained based on the drawings. The size of each component in the drawings may be exaggerated for explanation and does not indicate the actual size.

1 is a plan view showing an electrochromic device according to an embodiment. FIG. 2 is a cross-sectional view taken along line A-A' in FIG. 1. Figure 3 is an enlarged cross-sectional view of the first extension part. Figure 4 is an enlarged cross-sectional view of the second extension part. Figure 5 is a cross-sectional view showing a cross-section of an electrochromic device according to another embodiment.

1 to 4, the electrochromic device according to the embodiment includes a first substrate 100, a second substrate 200, a first transparent electrode 300, a second transparent electrode 400, and a first color changer. It includes a layer 500, a second discoloration layer 600, an electrolyte layer 700, a first sealing portion 800, and a second sealing portion 900.

The first substrate 100, together with the second substrate 200, includes the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode. (400) and supports the electrolyte layer (700).

In addition, the first substrate 100, along with the second substrate 200, include the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode 300. The electrode 400 and the electrolyte layer 700 are sandwiched. The first substrate 100, together with the second substrate 200, includes the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode ( 400) and the electrolyte layer 700 can be protected from external physical and chemical shock.

The first substrate 100 may include polymer resin. The first substrate 100 may include at least one from the group consisting of polyester-based resin, polyimide-based resin, cyclic olefin polymer resin, polyethersulfone, polycarbonate, or polyolefin-based resin.

The first substrate 100 may include polyester resin as a main component. The first substrate 100 may include polyethylene terephthalate. The first substrate 100 may contain polyethylene terephthalate in an amount of about 90 wt% or more based on the total composition. The first substrate 100 may contain polyethylene terephthalate in an amount of about 95 wt% or more based on the total composition. The first substrate 100 may contain polyethylene terephthalate in an amount of about 97 wt% or more based on the total composition. The first substrate 100 may contain polyethylene terephthalate in an amount of about 98 wt% or more based on the total composition.

The first substrate 100 may include a uniaxially or biaxially stretched polyethylene terephthalate film. The first substrate 100 may include a polyethylene terephthalate film stretched about 2 to about 5 times in the longitudinal direction and/or the width direction.

The first substrate 100 may have high mechanical properties to reinforce the glass when applied to the windows of a building or vehicle.

The first substrate 100 may have a tensile strength of about 7 kgf/mm2 to about 40 kgf/mm2 in the longitudinal direction. The first substrate 100 may have a tensile strength of about 8 kgf/mm2 to about 35 kgf/mm2 in the longitudinal direction.

The first substrate 100 may have a tensile strength of about 7 kgf/mm2 to about 40 kgf/mm2 in the width direction. The first substrate 100 may have a tensile strength of about 8 kgf/mm2 to about 35 kgf/mm2 in the width direction.

The first substrate 100 may have a modulus of about 200 kgf/mm2 to about 400 kgf/mm2 in the longitudinal direction. The first substrate 100 may have a modulus of about 250 kgf/mm2 to about 350 kgf/mm2 in the longitudinal direction. The first substrate 100 may have a modulus of about 250 kgf/mm2 to about 270 kgf/mm2 in the longitudinal direction.

The first substrate 100 may have a modulus of about 200 kgf/mm2 to about 400 kgf/mm2 in the width direction. The first substrate 100 may have a modulus of about 250 kgf/mm2 to about 350 kgf/mm2 in the width direction. The first substrate 100 may have a modulus of about 250 kgf/mm2 to about 270 kgf/mm2 in the width direction.

The first substrate 100 may have an elongation at break of about 30% to about 150% in the longitudinal direction. The first substrate 100 may have an elongation at break of about 30% to about 130% in the longitudinal direction. The first substrate 100 may have an elongation at break of about 40% to about 120% in the longitudinal direction.

The first substrate 100 may have an elongation at break of about 30% to about 150% in the longitudinal direction. The first substrate 100 may have an elongation at break of about 30% to about 130% in the longitudinal direction. The first substrate 100 may have an elongation at break of about 40% to about 120% in the longitudinal direction.

The first substrate 100 may have an elongation at break of about 30% to about 150% in the width direction. The first substrate 100 may have an elongation at break of about 30% to about 130% in the width direction. The first substrate 100 may have an elongation at break of about 40% to about 120% in the width direction.

The modulus, the elongation at break and the tensile strength can be measured according to KS B 5521.

Additionally, the modulus, tensile strength, and elongation at break can be measured by ASTM D882.

Because the first substrate 100 has the improved mechanical strength as described above, the first transparent electrode 300, the second transparent electrode 400, the first color change layer 500, and the second color change layer (600) and the electrolyte layer 700 can be efficiently protected. Additionally, because the first substrate 100 has improved mechanical strength as described above, it can efficiently reinforce the mechanical strength of the glass to which it is to be attached.

Additionally, the first substrate 100 may have high chemical resistance. Accordingly, even if the electrolyte contained in the electrolyte leaks to the first substrate 100, damage to the surface of the first substrate 100 can be minimized.

The first substrate 100 may have improved optical properties. The total light transmittance of the first substrate 100 may be about 55% or more. The total light transmittance of the first substrate 100 may be about 70% or more. The total light transmittance of the first substrate 100 may be about 75% to about 99%. The total light transmittance of the first substrate 100 may be about 80% to about 99%.

The haze of the first substrate 100 may be about 20% or less. It may be from about 0.1% to about 20%. The haze of the first substrate 100 may be about 0.1% to about 10%. The haze of the first substrate 100 may be about 0.1% to about 7%.

The total light transmittance and the haze can be measured by ASTM D 1003, etc.

Since the first substrate 100 has appropriate total light transmittance and haze, the electrochromic device according to the embodiment can have improved optical properties. That is, because the first substrate 100 has appropriate transmittance and haze, the electrochromic device according to the embodiment is applied to the window, appropriately adjusting the transmittance, minimizing distortion of the image from the outside, and improving appearance. You can have

Additionally, the first substrate 100 may have an in-plane retardation of about 100 nm to about 4000 nm. The first substrate 100 may have an in-plane retardation of about 200 nm to about 3500 nm. The first substrate 100 may have an in-plane retardation of about 200 nm to about 3000 nm.

The first substrate 100 may have an in-plane retardation of about 7000 nm or more. The first substrate 100 may have an in-plane retardation of about 7000 nm to about 50000 nm. The first substrate 100 may have an in-plane retardation of about 8000 nm to about 20000 nm.

The in-plane phase difference can be derived from the refractive index and thickness depending on the direction of the first substrate 100.

Since the first substrate 100 has the above-described in-plane retardation, the decor sheet according to the embodiment may have an improved appearance.

The thickness of the first substrate 100 may be about 10 μm to about 200 μm. The thickness of the first substrate 100 may be about 23 μm to about 150 μm. The thickness of the first substrate 100 may be about 30 μm to about 120 μm.

The first substrate 100 may include organic or inorganic filler. The organic or inorganic filler may function as an anti-blocking agent.

The average particle diameter of the filler may be about 0.1 μm to about 5 μm. The average particle diameter of the filler may be about 0.1 μm to about 3 μm. The average particle diameter of the filler may be about 0.1 μm to about 1 μm.

The filler may be selected from at least one group consisting of silica particles, barium sulfate particles, alumina particles, or titania particles.

Additionally, the filler may be included in the first substrate 100 in an amount of about 0.01 wt% to about 3 wt% based on the entire first substrate 100. The filler may be included in the first substrate 100 in an amount of about 0.05 wt% to about 2 wt% based on the entire first substrate 100.

The first substrate 100 may have a single-layer structure. For example, the first substrate 100 may be a single-layer polyester film.

The first substrate 100 may have a multilayer structure. For example, the first substrate 100 may be a multilayer co-extruded film. The multilayer coextruded structure may include a center layer, a first surface layer, and a second surface layer. The filler may be included in the first surface layer and the second surface layer.

The second substrate 200 faces the first substrate 100. The second substrate 200 is disposed on the first substrate 100. One end of the second substrate 200 may be arranged to be offset from one end of the first substrate 100 . The other end of the second substrate 200 may be arranged to be offset from the other end of the first substrate 100.

The second substrate 200 includes the first substrate 100, the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode. (400) and supports the electrolyte layer (700).

In addition, the second substrate 200 includes the first substrate 100, the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode 300. The electrode 400 and the electrolyte layer 700 are sandwiched. The second substrate 200, together with the first substrate 100, includes the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode ( 400) and the electrolyte layer 700 can be protected from external physical and chemical shock.

The second substrate 200 may include polymer resin. The second substrate 200 may include at least one from the group consisting of polyester-based resin, polyimide-based resin, cyclic olefin polymer resin, polyethersulfone, polycarbonate, or polyolefin-based resin.

The second substrate 200 may include polyester resin as a main component. The second substrate 200 may include polyethylene terephthalate. The second substrate 200 may contain polyethylene terephthalate in an amount of about 90 wt% or more based on the total composition. The second substrate 200 may contain polyethylene terephthalate in an amount of about 95 wt% or more based on the total composition. The second substrate 200 may contain polyethylene terephthalate in an amount of about 97 wt% or more based on the total composition. The second substrate 200 may contain polyethylene terephthalate in an amount of about 98 wt% or more based on the total composition.

The second substrate 200 may include a uniaxially or biaxially stretched polyethylene terephthalate film. The second substrate 200 may include a polyethylene terephthalate film stretched about 2 to about 5 times in the longitudinal direction and/or the width direction.

The second substrate 200 may have high mechanical properties to reinforce the glass when applied to the windows of a building or vehicle.

The second substrate 200 may have a tensile strength of about 7 kgf/mm2 to about 40 kgf/mm2 in the longitudinal direction. The second substrate 200 may have a tensile strength of about 8 kgf/mm2 to about 35 kgf/mm2 in the longitudinal direction.

The second substrate 200 may have a tensile strength of about 7 kgf/mm2 to about 40 kgf/mm2 in the width direction. The second substrate 200 may have a tensile strength of about 8 kgf/mm2 to about 35 kgf/mm2 in the width direction.

The second substrate 200 may have a modulus of about 200 kgf/mm2 to about 400 kgf/mm2 in the longitudinal direction. The second substrate 200 may have a modulus of about 250 kgf/mm2 to about 350 kgf/mm2 in the longitudinal direction. The second substrate 200 may have a modulus of about 250 kgf/mm2 to about 270 kgf/mm2 in the longitudinal direction.

The second substrate 200 may have a modulus of about 200 kgf/mm2 to about 400 kgf/mm2 in the width direction. The second substrate 200 may have a modulus of about 250 kgf/mm2 to about 350 kgf/mm2 in the width direction. The second substrate 200 may have a modulus of about 250 kgf/mm2 to about 270 kgf/mm2 in the width direction.

The second substrate 200 may have an elongation at break of about 30% to about 150% in the longitudinal direction. The second substrate 200 may have an elongation at break of about 30% to about 130% in the longitudinal direction. The second substrate 200 may have an elongation at break of about 40% to about 120% in the longitudinal direction.

The second substrate 200 may have an elongation at break of about 30% to about 150% in the longitudinal direction. The second substrate 200 may have an elongation at break of about 30% to about 130% in the longitudinal direction. The second substrate 200 may have an elongation at break of about 40% to about 120% in the longitudinal direction.

The second substrate 200 may have an elongation at break of about 30% to about 150% in the width direction. The second substrate 200 may have an elongation at break of about 30% to about 130% in the width direction. The second substrate 200 may have an elongation at break of about 40% to about 120% in the width direction.

Because the second substrate 200 has the improved mechanical strength as described above, the first transparent electrode 300, the second transparent electrode 400, the first color changing layer 500, and the second color changing layer (600) and the electrolyte layer 700 can be efficiently protected. Additionally, because the second substrate 200 has improved mechanical strength as described above, it can efficiently reinforce the mechanical strength of the glass to which it is to be attached.

Additionally, the second substrate 200 may have high chemical resistance. Accordingly, even if the electrolyte contained in the electrolyte leaks to the second substrate 200, damage to the surface of the second substrate 200 can be minimized.

The second substrate 200 may have improved optical properties. The total light transmittance of the second substrate 200 may be about 55% or more. The total light transmittance of the second substrate 200 may be about 70% or more. The total light transmittance of the second substrate 200 may be about 75% to about 99%. The total light transmittance of the second substrate 200 may be about 80% to about 99%.

The haze of the second substrate 200 may be about 20% or less. It may be from about 0.1% to about 20%. The haze of the second substrate 200 may be about 0.1% to about 10%. The haze of the second substrate 200 may be about 0.1% to about 7%.

Since the second substrate 200 has appropriate total light transmittance and haze, the electrochromic device according to the embodiment can have improved optical properties. That is, because the second substrate 200 has appropriate transmittance and haze, the electrochromic device according to the embodiment is applied to the window, appropriately adjusting the transmittance, minimizing distortion of the image from the outside, and improving appearance. You can have

Additionally, the second substrate 200 may have an in-plane retardation of about 100 nm to about 4000 nm. The second substrate 200 may have an in-plane retardation of about 200 nm to about 3500 nm. The second substrate 200 may have an in-plane retardation of about 200 nm to about 3000 nm.

The second substrate 200 may have an in-plane retardation of about 7000 nm or more. The second substrate 200 may have an in-plane retardation of about 7000 nm to about 50000 nm. The second substrate 200 may have an in-plane retardation of about 8000 nm to about 20000 nm.

The in-plane retardation may be derived from the refractive index and thickness of the second substrate 200 according to its direction.

Since the second substrate 200 has the same in-plane phase difference as described above, the decor sheet according to the embodiment may have an improved appearance.

The thickness of the second substrate 200 may be about 10 μm to about 200 μm. The thickness of the first substrate 100 may be about 23 μm to about 150 μm. The thickness of the first substrate 100 may be about 30 μm to about 120 μm.

The second substrate 200 may include organic or inorganic filler. The organic or inorganic filler may function as an anti-blocking agent.

The average particle diameter of the filler may be about 0.1 μm to about 5 μm. The average particle diameter of the filler may be about 0.1 μm to about 3 μm. The average particle diameter of the filler may be about 0.1 μm to about 1 μm.

The filler may be selected from at least one group consisting of silica particles, barium sulfate particles, alumina particles, or titania particles.

Additionally, the filler may be included in the second substrate 200 in an amount of about 0.01 wt% to about 3 wt% based on the entire second substrate 200. The filler may be included in the second substrate 200 in an amount of about 0.05 wt% to about 2 wt% based on the entire second substrate 200.

The second substrate 200 may have a single-layer structure. For example, the second substrate 200 may be a single-layer polyester film.

The second substrate 200 may have a multilayer structure. For example, the second substrate 200 may be a multilayer co-extruded film.

The first substrate 100 and the second substrate 200 may be flexible. Accordingly, the electrochromic device according to the embodiment may be flexible as a whole.

The first transparent electrode 300 is disposed on the first substrate 100. The first transparent electrode 300 may be formed by depositing on the first substrate 100. Additionally, a hard coating layer may be further included between the first transparent electrode 300 and the first substrate 100.

The first transparent electrode 300 is made of tin oxide, zinc oxide, silver (Ag), chromium (Cr), indium tin oxide (ITO), fluorine doped tin oxide (FTO), and aluminum. Aluminum doped Zinc Oxide (AZO), Gallium doped Zinc Oxide (GZO), Antimony doped Tin Oxide (ATO), Indium zinc oxide (IZO), It may include at least one from the group consisting of Niobium doped Titanium Oxide (NTO) or Cadmium Tin Oxide (CTO).

Additionally, the first transparent electrode 300 may include graphene, silver nanowire, and/or metal mesh.

The first transparent electrode 300 may have a total light transmittance of about 80% or more. The first transparent electrode 300 may have a total light transmittance of about 85% or more. The first transparent electrode 300 may have a total light transmittance of about 88% or more.

The first transparent electrode 300 may have a haze of about 10% or less. The first transparent electrode 300 may have a haze of about 7% or less. The first transparent electrode 300 may have a haze of about 5% or less.

The sheet resistance of the first transparent electrode 300 may be about 1Ω/sq to 60Ω/sq. The sheet resistance of the first transparent electrode 300 may be about 1Ω/sq to 40Ω/sq. The sheet resistance of the first transparent electrode 300 may be about 1Ω/sq to 30Ω/sq.

The thickness of the first transparent electrode 300 may be about 50 nm to about 50 μm. The thickness of the first transparent electrode 300 may be about 100 nm to about 10 μm. The thickness of the first transparent electrode 300 may be about 150 nm to about 5 μm.

The first transparent electrode 300 is electrically connected to the first color change layer 500. Additionally, the first transparent electrode 300 is electrically connected to the electrolyte layer 700 through the first discoloration layer 500.

The second transparent electrode 400 is disposed below the second substrate 200. The second transparent electrode 400 may be formed by depositing on the second substrate 200. Additionally, a hard coating layer may be further included between the second transparent electrode 400 and the second substrate 200.

The second transparent electrode 400 is made of tin oxide, zinc oxide, silver (Ag), chromium (Cr), indium tin oxide (ITO), fluorine doped tin oxide (FTO), and aluminum. Aluminum doped Zinc Oxide (AZO), Gallium doped Zinc Oxide (GZO), Antimony doped Tin Oxide (ATO), Indium zinc oxide (IZO), It may include at least one from the group consisting of Niobium doped Titanium Oxide (NTO) or Cadmium Tin Oxide (CTO).

Additionally, the second transparent electrode 400 may include graphene, silver nanowire, and/or metal mesh.

The second transparent electrode 400 may have a total light transmittance of about 80% or more. The second transparent electrode 400 may have a total light transmittance of about 85% or more. The second transparent electrode 400 may have a total light transmittance of about 88% or more.

The second transparent electrode 400 may have a haze of about 10% or less. The second transparent electrode 400 may have a haze of about 7% or less. The second transparent electrode 400 may have a haze of about 5% or less.

The sheet resistance of the second transparent electrode 400 may be about 1Ω/sq to 60Ω/sq. The sheet resistance of the second transparent electrode 400 may be about 1Ω/sq to 40Ω/sq. The sheet resistance of the second transparent electrode 400 may be about 1Ω/sq to 30Ω/sq.

The thickness of the second transparent electrode 400 may be about 50 nm to about 50 μm. The thickness of the second transparent electrode 400 may be about 100 nm to about 10 μm. The thickness of the second transparent electrode 400 may be about 150 nm to about 5 μm.

The second transparent electrode 400 is electrically connected to the second color change layer 600. Additionally, the second transparent electrode 400 is electrically connected to the electrolyte layer 700 through the second discoloration layer 600.

The first discoloration layer 500 is disposed on the first transparent electrode 300. The first discoloration layer 500 may be placed directly on the upper surface of the first transparent electrode 300. The first discoloration layer 500 may be directly electrically connected to the first transparent electrode 300.

The first discoloration layer 500 is electrically connected to the first transparent electrode 300. The first discoloration layer 500 may be directly connected to the first transparent electrode 300. Additionally, the first discoloration layer 500 is electrically connected to the electrolyte layer 700. The first discoloration layer 500 may be electrically connected to the electrolyte layer 700.

The first color changing layer 500 may change color by receiving electrons. The first color changing layer 500 may include a first electrochromic material that changes color when supplied with electrons. The first electrochromic material is tungsten oxide, niobium pentaoxide, vanadium pentaoxide, titanium oxide, molybdenum oxide, vilogen, or poly(3,4-ethylenedioxythiophene). ;PEDOT) may include at least one from the group.

The first color changing layer 500 may include the first electrochromic material in particle form. The tungsten oxide, niobium pentaoxide, vanadium pentaoxide, titanium oxide, and molybdenum oxide may be particles having a particle size of about 1 nm to about 200 nm.

Additionally, the first discoloration layer 500 may further include a binder. The binder may be an inorganic binder. The binder may include silica gel. The binder may be formed of silica sol containing tetramethoxysilane or methyltrimethoxysilane.

The second color change layer 600 is disposed below the second transparent electrode 400. The second discoloration layer 600 may be directly disposed on the lower surface of the second transparent electrode 400. The second discoloration layer 600 may be directly electrically connected to the second transparent electrode 400.

The second color changing layer 600 is electrically connected to the second transparent electrode 400. The second color change layer 600 may be directly connected to the second transparent electrode 400. Additionally, the second discoloration layer 600 is electrically connected to the electrolyte layer 700. The second discoloration layer 600 may be electrically connected to the electrolyte layer 700.

The second color changing layer 600 may change color as it loses electrons. The second color changing layer 600 may include a second electrochromic material that is oxidized and changes color while losing electrons. The second discoloration layer 600 may include at least one from the group consisting of Prussian blue, nickel oxide, and iridium oxide.

The second color changing layer 600 may include the second electrochromic material in particle form. The Prussian blue, nickel oxide, and iridium oxide may be particles having a particle size of about 1 nm to about 200 nm.

Additionally, the second discoloration layer 600 may further include the binder.

The electrolyte layer 700 is disposed on the first discoloration layer 500. Additionally, the electrolyte layer 700 is disposed below the second discoloration layer 600. The electrolyte layer 700 is disposed between the first discoloring layer 500 and the second discoloring layer 600.

The electrolyte layer 700 may include a solid polymer electrolyte containing metal ions or an inorganic hydrate. The electrolyte layer 700 may include lithium ions (Li+), sodium ions (Na+), potassium ions (K+), etc.

Specifically, Poly-AMPS, PEO/LiCF ₃ SO ₃ , etc. can be used as the solid polymer electrolyte, and Sb ₂ O ₅ .4H ₂ O, etc. can be used as the inorganic hydrate.

Additionally, the electrolyte layer 700 is configured to provide electrolyte ions involved in electrochromic reaction. The electrolyte ion may be, for example, a monovalent cation such as H+, Li+, Na+, K+, Rb+, or Cs+.

The electrolyte layer 700 may include an electrolyte. As examples of the electrolyte, liquid electrolyte, gel polymer electrolyte, or inorganic solid electrolyte can be used without limitation. Additionally, the electrolyte may be used in the form of a single layer or film so that it can be laminated together with the electrode or substrate.

The type of electrolyte salt used in the electrolyte layer 700 is not particularly limited as long as it can contain a compound capable of providing monovalent cations, that is, H+, Li+, Na+, K+, Rb+, or Cs+. For example, the electrolyte layer 700 includes LiClO ₄ , LiBF ₄ , LiAsF ₆ , LiPF ₆ , LiCl, LiBr, LiI, LiB ₁₀ Cl ₁₀ , LiCF ₃ SO ₃ , LiCF ₃ CO ₂ , LiAsF ₆ , LiSbF ₆ , Lithium salt compounds such as LiAlCl ₄ , CH ₃ SO ₃ Li, CF ₃ SO ₃ Li or (CF ₃ SO ₂ ) ₂ NLi; Alternatively, it may include a sodium salt compound such as NaClO ₄ .

In one example, the electrolyte layer 700 may include a Cl or F element-containing compound as an electrolyte salt. Specifically, the electrolyte layer 700 is LiClO ₄ , LiBF ₄ , LiAsF ₆ , LiPF ₆ , LiCl, LiB ₁₀ Cl ₁₀ , LiCF ₃ SO ₃ , LiCF ₃ CO ₂ , LiAsF ₆ , LiSbF ₆ , LiAlCl ₄ , CF ₃ It may include one or more electrolyte salts selected from SO ₃ Li, (CF ₃ SO ₂ ) ₂ NLi, and NaClO ₄ .

The electrolyte may further include a carbonate compound as a solvent. Since carbonate-based compounds have a high dielectric constant, ionic conductivity can be increased. As a non-limiting example, a solvent such as propylene carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), or ethylmethyl carbonate (EMC) may be used as a carbonate-based compound.

In another example, when the electrolyte layer 700 includes a gel polymer electrolyte, the electrolyte layer 700 may include poly-vinyl sulfonic acid, poly-styrene sulfonic acid, ), Poly-ethylene sulfonic acid, Poly-2-acrylamido-2methyl-propane sulfonic acid, Poly-perfluoro sulfonic acid acid), poly-toluene sulfonic acid, poly-vinyl alcohol, poly-ethylene imine, poly-vinyl pyrrolidone, poly -Ethylene oxide (Poly-ethylene oxide (PEO)), poly-propylene oxide (PPO), poly-(ethylene oxide, siloxane) (PEOS), poly- (ethylene glycol, siloxane)(poly-(ethylene glycol, siloxane)), poly-(propylene oxide, siloxane)(poly-(propylene oxide, siloxane)), poly-(ethylene oxide, methyl methacrylate)(poly- (ethylene oxide, methyl methacrylate) (PEO-PMMA)), poly-(ethylene oxide, acrylic acid) (PEO PAA)), poly-(propylene glycol, methyl methacrylate)( It may include polymers such as poly-(propylene glycol, methyl methacrylate) (PPG PMMA)), poly-ethylene succinate, or poly-ethylene adipate. In one example, a mixture of two or more or a copolymer of two or more of the polymers listed above may be used as the polymer electrolyte.

Additionally, the electrolyte layer 700 may include a curable resin that can be hardened by ultraviolet ray irradiation or heat. The curable resin may be at least one selected from the group consisting of acrylate-based oligomers, polyethylene glycol-based oligomers, urethane-based oligomers, polyester-based oligomers, polyethylene glycol dimethyl, or polyethylene glycol diacrylate. Additionally, the electrolyte layer 700 may include a photocuring initiator and/or a thermal curing initiator.

The thickness of the electrolyte layer 700 may be about 10 ㎛ to about 200 ㎛. The thickness of the electrolyte layer 700 may be about 50 μm to about 150 μm.

The electrolyte layer 700 may have a transmittance in the range of 60% to 95%. Specifically, the electrolyte layer 700 may have a transmittance of 60% to 95% for visible light in the wavelength range of 380 nm to 780 nm, more specifically, 400 nm wavelength or 550 nm wavelength. The transmittance can be measured using a known haze meter (HM).

The electrochromic device according to the embodiment includes a first open area OA1. The first open area OA1 includes the second substrate 200, the second transparent electrode 400, the second discoloration layer 600, the electrolyte layer 700, and the first discoloration layer 500. It can be formed by removing part of. The first open area OA1 includes the second substrate 200, the second transparent electrode 400, the second discoloration layer 600, the electrolyte layer 700, and the first discoloration layer 500. A portion of the upper surface of the first transparent electrode 300 may be exposed by removing a portion of the .

Additionally, the first open area OA1 may be disposed at an edge portion of the first substrate 100 and the first transparent electrode 300. The first open area OA1 may have a shape extending in one direction along an edge portion of the first substrate 100 and the first electrode.

The first open area OA1 may be disposed between the first side 101 of the first substrate 100 and the third side 201 of the second substrate 200. The first side 101 and the third side 201 may be arranged on different planes. Additionally, the first side 101 and the third side 201 may extend in parallel directions.

The third side 201 may be disposed closer to the center of the electrochromic device according to the embodiment than the first side 101.

Additionally, the first open area OA1 may be disposed between the seventh side 301 and the third side 201 of the first transparent electrode 300. Additionally, the first open area OA1 may be disposed between the first side 101 and the ninth side 501 of the first color change layer 500. Additionally, the first open area OA1 may be disposed between the first side 101 and the fifth side 701 of the electrolyte layer 700. Additionally, the first open area OA1 may be disposed between the first side 101 and the 11th side 601 of the second color change layer 600. The first open area OA1 may be disposed between the first side 101 and the thirteenth side 401 of the second transparent electrode 400.

Additionally, the third side 201, the fifth side 701, the ninth side 501, the 11th side 601, and the 13th side 401 may be disposed on the same plane.

The width of the first open area OA1 may be about 1 mm to about 20 mm. The width of the first open area OA1 may be about 2 mm to about 10 mm.

The electrochromic device according to the embodiment includes a second open area OA2. The second open area OA2 includes a portion of the first substrate 100, a portion of the first transparent electrode 300, a portion of the first discoloration layer 500, a portion of the electrolyte layer 700, and It may be formed by removing a portion of the second discoloration layer 600. The second open area OA2 includes a portion of the first substrate 100, a portion of the first transparent electrode 300, a portion of the first discoloration layer 500, a portion of the electrolyte layer 700, and A portion of the second discoloration layer 600 may be removed to expose a portion of the lower surface of the second transparent electrode 400.

Additionally, the second open area OA2 may be disposed at edge portions of the second substrate 200 and the second transparent electrode 400. The second open area OA2 may have a shape extending in one direction along edge portions of the second substrate 200 and the second transparent electrode 400. The second open area OA2 may extend parallel to the first open area OA1.

The second open area OA2 may be disposed between the second side 102 of the first substrate 100 and the fourth side 202 of the second substrate 200. The second side 102 and the fourth side 202 may be disposed on different planes. Additionally, the second side 102 and the fourth side 202 may extend in parallel directions.

The second side 102 may be disposed closer to the center of the electrochromic device according to the embodiment than the fourth side 202.

Additionally, the second open area OA2 may be disposed between the fourteenth side 402 and the second side 102 of the second transparent electrode 400. Additionally, the second open area OA2 may be disposed between the fourth side 202 and the tenth side 502 of the first color change layer 500 . Additionally, the second open area OA2 may be disposed between the fourth side 202 and the sixth side 702 of the electrolyte layer 700. Additionally, the second open area OA2 may be disposed between the fourth side 202 and the twelfth side 602 of the second color change layer 600. The second open area OA2 may be disposed between the fourth side 202 and the eighth side 302 of the first transparent electrode 300.

Additionally, the second side 102, the sixth side 702, the eighth side 302, the tenth side 502, and the twelfth side 602 may be disposed on the same plane.

The width of the second open area OA2 may be about 1 mm to about 20 mm. The width of the second open area OA2 may be about 2 mm to about 10 mm.

The first sealing part 800 is disposed in the first open area OA1. The first sealing part 800 is disposed on the exposed upper surface of the first transparent electrode 300. The first sealing part 800 covers the exposed upper surface of the first transparent electrode 300. The first sealing part 800 may be placed directly on the exposed upper surface of the first transparent electrode 300. The first sealing part 800 may be in close contact with the exposed upper surface of the first transparent electrode 300. The first sealing part 800 may be adhered to the exposed upper surface of the first transparent electrode 300.

The first sealing portion 800 includes the third side 201, the fifth side 701, the seventh side 301, the ninth side 501, the eleventh side 601, and the Covers the 13th side (401). The first sealing portion 800 includes the third side 201, the fifth side 701, the seventh side 301, the ninth side 501, the eleventh side 601, and the It is disposed on the 13th side 401. The first sealing portion 800 includes the third side 201, the fifth side 701, the seventh side 301, the ninth side 501, the eleventh side 601, and the third side 701. 13 can be placed directly on the side 401. The first sealing portion 800 includes the third side 201, the fifth side 701, the seventh side 301, the ninth side 501, the eleventh side 601, and the third side 701. 13 It can be in close contact with the side 401. The first sealing portion 800 includes the third side 201, the fifth side 701, the seventh side 301, the ninth side 501, the eleventh side 601, and the third side 701. 13 Can be attached to the side 401.

The first sealing part 800 may cover a portion of the upper surface of the second substrate 200. The first sealing part 800 may be disposed on a portion of the upper surface of the second substrate 200. The first sealing part 800 may be in close contact with a portion of the upper surface of the second substrate 200. The first sealing part 800 may be adhered to a portion of the upper surface of the second substrate 200.

The first sealing part 800 includes a first body part 810 and a first extension part 820.

The first body portion 810 is disposed in the first open area OA1. The first body portion 810 has the exposed upper surface of the first transparent electrode 300, the third side 201, the fifth side 701, the seventh side 301, and the ninth side ( 501), covering the 11th side 601 and the 13th side 401.

The first extension part 820 extends from the first body part 810 to the upper surface of the second substrate 200. The first extension 820 covers a portion of the upper surface of the second substrate 200. The first extension 820 is in close contact with a portion of the upper surface of the second substrate 200. The first extension 820 is attached to a portion of the upper surface of the second substrate 200.

The thickness T1 of the first extension 820 may be about 10 μm to about 1000 μm. The thickness T1 of the first extension 820 may be about 50 μm to about 500 μm. The thickness T1 of the first extension 820 may be about 50 μm to about 300 μm.

Additionally, the width W1 of the first extension 820 may be about 1 mm to about 20 mm. The width W1 of the first extension 820 may be about 3 mm to about 10 mm.

Since the first extension portion 820 has the same thickness and width as described above, the electrochromic device according to the embodiment includes the electrolyte layer 700, the first color change layer 500, and the second color change layer. The layer 600 and the second transparent electrode 400 can be efficiently protected.

Additionally, the first sealing part 800 may further include a first flattening part 830.

The first planarization part 830 has a level difference from the upper surface of the second substrate 200. The first planarization part 830 may extend in a direction corresponding to the direction in which the upper surface of the second substrate 200 extends. That is, the first planarization part 830 may be substantially parallel to the top surface of the second substrate 200 and may have a step difference from the top surface of the second substrate 200.

Since the first sealing part 800 has the first flattening part 830, the upper surface of the first sealing part 800 may be entirely flat. Accordingly, the electrochromic device according to the embodiment can minimize the thickness deviation of the edge portion. Accordingly, the electrochromic device according to the embodiment can minimize defects due to thickness deviation.

The second sealing part 900 is disposed in the second open area OA2. The second sealing part 900 is disposed on the exposed lower surface of the second transparent electrode 400. The second sealing part 900 covers the exposed lower surface of the second transparent electrode 400. The second sealing part 900 may be placed directly on the exposed lower surface of the second transparent electrode 400. The second sealing part 900 may be in close contact with the exposed lower surface of the second transparent electrode 400. The second sealing part 900 may be adhered to the exposed lower surface of the second transparent electrode 400.

The second seal 900 includes the second side 102, the fourth side 202, the sixth side 702, the eighth side 302, the tenth side 502, and the Covers the twelfth side (602). The second seal 900 includes the second side 102, the fourth side 202, the sixth side 702, the eighth side 302, the tenth side 502, and the It is disposed on the twelfth side 602. The second seal 900 includes the second side 102, the fourth side 202, the sixth side 702, the eighth side 302, the tenth side 502, and the It can be placed directly on the twelfth side 602. The second seal 900 includes the second side 102, the fourth side 202, the sixth side 702, the eighth side 302, the tenth side 502, and the It may be in close contact with the twelfth side 602. The second seal 900 includes the second side 102, the fourth side 202, the sixth side 702, the eighth side 302, the tenth side 502, and the It may be adhered to the twelfth side 602.

The second sealing part 900 may cover a portion of the lower surface of the first substrate 100. The second sealing part 900 may be disposed on a portion of the lower surface of the first substrate 100. The second sealing part 900 may be in close contact with a portion of the lower surface of the first substrate 100. The second sealing part 900 may be adhered to a portion of the lower surface of the first substrate 100.

The second sealing part 900 includes a second body part 910 and a second extension part 920.

The second body portion 910 is disposed in the second open area OA2. The second body portion 910 is the exposed lower surface of the second transparent electrode 400, the second side 102, the fourth side 202, the sixth side 702, and the eighth side. (302), covering the tenth side (502) and the twelfth side (602).

The second extension part 920 extends from the second body part 910 to the lower surface of the first substrate 100. The second extension 920 covers a portion of the lower surface of the first substrate 100. The second extension part 920 is in close contact with a portion of the lower surface of the first substrate 100. The second extension part 920 is attached to a portion of the lower surface of the first substrate 100.

The thickness T2 of the second extension portion 920 may be about 10 μm to about 1000 μm. The thickness T2 of the second extension portion 920 may be about 50 μm to about 500 μm. The thickness T2 of the second extension portion 920 may be about 50 μm to about 300 μm.

Additionally, the width W2 of the second extension portion 920 may be about 1 mm to about 20 mm. The width W2 of the second extension portion 920 may be about 3 mm to about 10 mm.

Since the second extension portion 920 has the same thickness and width as described above, the electrochromic device according to the embodiment includes the electrolyte layer 700, the first color changing layer 500, and the second color changing layer. The layer 600 and the first transparent electrode 300 can be efficiently protected.

Additionally, the second sealing part 900 may further include a second flattening part 930.

The second planarization part 930 has a level difference from the lower surface of the first substrate 100. The second planarization part 930 may extend in a direction corresponding to the direction in which the lower surface of the first substrate 100 extends. That is, the second planarization part 930 may be substantially parallel to the lower surface of the first substrate 100 and may have a level difference from the lower surface of the first substrate 100.

Since the second sealing part 900 has the second flattening part 930, the lower surface of the second sealing part 900 may be entirely flat. Accordingly, the electrochromic device according to the embodiment can minimize the thickness deviation of the edge portion. Accordingly, the electrochromic device according to the embodiment can minimize defects due to thickness deviation.

The first sealing part 800 and/or the second sealing part 900 includes a curable resin. The second sealing part 900 may include a thermosetting resin and/or a photo-curing resin.

Examples of the thermosetting resin include epoxy resin, melamine resin, urea resin, or unsaturated polyester resin. In addition, examples of the epoxy resin include phenol novolak-type epoxy resin, cresol novolak-type epoxy resin, biphenyl novolak-type epoxy resin, trisphenol novolak-type epoxy resin, dicyclopentadiene novolak-type epoxy resin, and bisphenol A type. Epoxy resin, bisphenol F type epoxy resin, 2, 2'-diaryrbisphenol A type epoxy resin, bisphenol S type epoxy resin, hydrogenated bisphenol A type epoxy resin, propylene oxide added bisphenol A type epoxy resin, biphenyl form Examples include epoxy resins, naphthalene type epoxy resins, resorcinol type epoxy resins, and glycidyl amines.

Additionally, the first sealing part 800 and/or the second sealing part 900 may further include a heat curing agent. Hydrazide compounds such as 1, 3-bis [hydrazinocarbonoethyl 5-isopropyl hydantoin] and adipic acid dihydrazide; dicyandiamide, guanidine derivatives, 1-cyanide Noethyl-2-phenylimidazole, N-[2-(2-methyl-1-imidazolyl) ethyl]urea, 2, 4-diamino-6-[2'-methylimidazolyl (1') ]-Ethyl-s-Thorazine, N, N'-Bis(2-methyl-1-imidazolyl ethyl) urea, N, N'-(2-methyl-1-imidazolyl ethyl)-aziformami , 2-phenyl-4-methyl-5-hydroxymethyl imidazole, 2-imidazoline-2-thiol, 2, 2'-thiogethanethiol, addition products of various amines with epoxy resins, etc. You can.

The first sealing part 800 and/or the second sealing part 900 may include a photo-curable resin. Examples of the photo-curable resin include acrylate-based resins such as urethane acrylate. Additionally, the first sealing part 800 and/or the second sealing part 900 may further include a photocuring initiator. The photo curing initiator may be at least one selected from the group consisting of an acetophenone-based compound, a benzophenone-based compound, a thioxanthone-based compound, a benzoin-based compound, a triazine-based compound, or an oxime-based compound.

Additionally, the first sealing part 800 and/or the second sealing part 900 may further include a moisture absorbent such as zeolite and/or silica.

Additionally, the first sealing part 800 and/or the second sealing part 900 may further include an inorganic filler. The inorganic filler may be a material with high insulating properties, transparency, and durability. Examples of the inorganic filler include silicon, aluminum, zirconia, or mixtures thereof.

Referring to FIG. 5, the electrochromic device according to the embodiment may further include a first bus bar 1010 and a second bus bar 1020.

The first bus bar 1010 is disposed on the first transparent electrode 300. The first bus bar 1010 may be disposed in the first open area OA1. The first bus bar 1010 is connected to the first transparent electrode 300. The first bus bar 1010 may be disposed on an upper surface of the first transparent electrode 300 opened by the first open area OA1.

The first bus bar 1010 may be electrically connected to the first transparent electrode 300. The first bus bar 1010 may be in direct contact with the upper surface of the first transparent electrode 300. The first bus bar 1010 may be connected to the first transparent electrode 300 through solder.

The first bus bar 1010 may extend in the direction in which the first open area OA1 extends. That is, the first bus bar 1010 may have a shape extending along the edge area of the first transparent electrode 300.

The first sealing part 800 may cover the first bus bar 1010. The first sealing part may cover the top and side surfaces of the first bus bar 1010. The first sealing part 800 may protect the first bus bar 1010.

Since the first sealing part 800 efficiently protects the first bus bar 1010, the first bus bar 1010 is not damaged by external impact or is damaged from the first transparent electrode 300. Disconnection of wires can be prevented.

The second bus bar 1020 is disposed below the second transparent electrode 400. The second bus bar 1020 may be disposed in the second open area OA2. The second bus bar 1020 is connected to the second transparent electrode 400. The second bus bar 1020 may be disposed on the lower surface of the second transparent electrode 400 opened by the second open area OA2.

The second bus bar 1020 may be electrically connected to the second transparent electrode 400. The second bus bar 1020 may be in direct contact with the lower surface of the second transparent electrode 400. The second bus bar 1020 may be connected to the second transparent electrode 400 through solder.

The second bus bar 1020 may extend in the direction in which the second open area OA2 extends. That is, the second bus bar 1020 may have a shape extending along the edge area of the second transparent electrode 400. Additionally, the first bus bar 1010 and the second bus bar 1020 may extend parallel to each other.

The second seal 900 may cover the second bus bar 1020. The second sealing part may cover the lower surface and side surfaces of the second bus bar 1020. The second seal 900 may protect the second bus bar 1020.

Since the second seal 900 efficiently protects the second bus bar 1020, the second bus bar 1020 is not damaged by external impact or is damaged by the second transparent electrode 400. Disconnection of wires can be prevented.

The first bus bar 1010 and/or the second bus bar 1020 may include metal. The first bus bar 1010 and/or the second bus bar 1020 may include a metal ribbon. The first bus bar 1010 and/or the second bus bar 1020 may include conductive paste. The first bus bar 1010 and/or the second bus bar 1020 may include a binder and a conductive filler.

The electrochromic device according to the embodiment can be manufactured by the following method. Figures 6 to 13 are cross-sectional views showing the process of manufacturing an electrochromic device according to an embodiment.

Referring to FIG. 6, a first transparent electrode 300 is formed on the first substrate 100. The first transparent electrode 300 may be formed through a vacuum deposition process. A metal oxide such as indium tin oxide may be deposited on the first substrate 100 through a sputtering process or the like to form the first transparent electrode 300.

The first transparent electrode 300 may be formed through a coating process. A nano metal wire may be coated with a binder on the first substrate 100 to form the first transparent electrode 300. A conductive polymer may be coated on the first substrate 100 to form the first transparent electrode 300.

Additionally, the first transparent electrode 300 may be formed through a patterning process. A metal layer may be formed on the first substrate 100 through a sputtering process, etc., and the metal layer may be patterned to form a first transparent electrode 300 including a metal mesh on the first substrate 100. .

Afterwards, a first discoloration layer 500 is formed on the first transparent electrode 300. The first discoloration layer 500 may be formed through a sol-gel coating process. A first sol solution containing a first electrochromic material, a binder, and a solvent may be coated on the first transparent electrode 300. A sol-gel reaction may occur in the coated first sol solution, and the first discoloration layer 500 may be formed.

The first sol solution may include the first discoloring material in particle form in an amount of about 5 wt% to about 30 wt%. The first sol solution may include the binder in an amount of about 5 wt% to about 30 wt%. The first sol solution may include the solvent in an amount of about 60 wt% to about 90 wt%.

The first sol solution may further include a dispersant.

The solvent may be at least one selected from the group consisting of alcohols, ethers, ketones, esters, or aromatic hydrocarbons. The solvent is ethanol, propanol, butanol, hexanol, cyclohexanol, diacetone alcohol, ethylene glycol, diethylene glycol, glycerin, diethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol modobutyl ether. , Diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, acetone, methyl ethyl ketone, acetylacetone, methyl isobutyl ketone, cyclohexanone, acetoacetate ester, methyl acetate, ethyl acetate, At least one or more may be selected from the group consisting of n-propyl acetate and i-butyl acetate.

As described above, the binder may be an inorganic binder.

Referring to FIG. 7, a second transparent electrode 400 is formed on the second substrate 200.

The second transparent electrode 400 may be formed through a vacuum deposition process. A metal oxide such as indium tin oxide may be deposited on the second substrate 200 through a sputtering process or the like to form the second transparent electrode 400.

The second transparent electrode 400 may be formed through a coating process. A nano metal wire may be coated with a binder on the second substrate 200 to form the second transparent electrode 400. A conductive polymer may be coated on the second substrate 200 to form the second transparent electrode 400.

Additionally, the second transparent electrode 400 may be formed through a patterning process. A metal layer may be formed on the second substrate 200 through a sputtering process, etc., and the metal layer may be patterned to form a second transparent electrode 400 including a metal mesh on the second substrate 200. .

Afterwards, a second discoloration layer 600 is formed on the second transparent electrode 400. The second discoloration layer 600 may be formed through a sol-gel coating process. A second sol solution containing a second electrochromic material, a binder, and a solvent may be coated on the second transparent electrode 400. A sol-gel reaction may occur in the coated second sol solution, and the second discoloration layer 600 may be formed.

The second sol solution may include the second discoloring material in particle form in an amount of about 5 wt% to about 30 wt%. The second sol solution may include the binder in an amount of about 5 wt% to about 30 wt%. The second sol solution may include the solvent in an amount of about 60 wt% to about 90 wt%.

The second sol solution may further include a dispersant.

Referring to FIG. 8, an electrolyte composition for forming an electrolyte layer 700 is formed on the first discoloration layer 500.

The electrolyte composition may include a metal salt, an electrolyte, a photo-curing resin, and a photo-curing initiator. The photo-curable resin includes hexandiol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), ethylene glycol diacrylate (EGDA), and trimethylolpropane triacrylate. TMPTA), trimethylolpropane ethoxylated triacrylate (TMPEOTA), glycerol propoxylated triacrylate (GPTA), pentaerythritol tetraacrylate (PETA), or Dipenta At least one may be selected from the group consisting of dipentaerythritol hexaacrylate (DPHA).

The metal salt, the electrolyte, and the photo curing initiator may be as described above.

Referring to FIG. 9, the second substrate 200, the second transparent electrode 400, and the second discoloration layer 600 are stacked on the coated electrolyte composition. At this time, the second discoloration layer 600 is in direct contact with the coated electrolyte composition.

Thereafter, the coated electrolyte composition is cured by light, and a first laminate including the first substrate 100, the first transparent electrode 300, and the first discoloration layer 500 and the second A second laminate including the substrate 200, the second transparent electrode 400, and the second color change layer 600 are laminated to each other. That is, the first laminate and the second laminate may be adhered to each other by the electrolyte layer 700.

Referring to FIG. 10, the first discoloring layer 500, the electrolyte layer 700, the second discoloring layer 600, the second transparent electrode 400, and a portion of the second substrate 200 is removed, forming the first open area OA1. The first open area OA1 exposes a portion of the upper surface of the first transparent electrode 300.

In addition, parts of the first substrate 100, the first transparent electrode 300, the first discoloration layer 500, the electrolyte layer 700, and the second discoloration layer 600 are removed, 2 An open area (OA2) is formed. The second open area OA2 exposes a portion of the lower surface of the second transparent electrode 400.

Referring to FIG. 11, the first curable resin composition 801 is disposed in the first open area OA1. The first curable resin composition 801 may be continuously disposed from the top surface of the first transparent electrode 300 to a portion of the top surface of the second substrate 200. That is, the first curable resin composition 801 is one side of the first discoloring layer 500, one side of the electrolyte layer 700, one side of the second discoloring layer 600, and the second transparent layer. One side of the electrode 400 and one side of the second substrate 200 may be covered.

A second curable resin composition 901 is disposed in the second open area OA2. The second curable resin composition 901 may be continuously disposed from the lower surface of the second transparent electrode 400 to a portion of the lower surface of the first substrate 100. That is, the second curable resin composition 901 is applied to the other side of the first substrate 100, the other side of the first discoloration layer 500, the other side of the electrolyte layer 700, and the second discoloration layer. It can cover the other side of (600).

Referring to FIG. 12, a first flattening member 10 is disposed on the first curable resin composition 801, and a predetermined amount is applied to the first curable resin composition 801 by the first flattening member 10. pressure is applied.

Thereafter, the first curable resin composition 801 is cured, and the first planarizing member 10 is removed. Accordingly, the first sealing portion 800 is formed. The first planarizing member 10 may be a film including a silicone release layer.

A second flattening member 20 is disposed below the second curable resin composition 901, and a predetermined pressure is applied to the second curable resin composition 901 by the second flattening member 20. The second planarizing member 20 may be a film including a silicone release layer.

Thereafter, the second curable resin composition 901 is cured, and the second planarizing member 20 is removed. Accordingly, the second sealing portion 900 is formed.

The first curable resin composition 801 and the second curable resin composition 901 may be cured simultaneously or sequentially. That is, the first curable resin composition 801 and the second curable resin composition 901 are simultaneously applied and planarized to form the first sealing portion 800 and the second sealing portion 900 at the same time. You can. Alternatively, the first curable resin composition 801 is applied and cured to form the first sealing portion 800, and the second curable resin composition is applied and cured to form the second sealing portion. (900) may be formed.

Accordingly, the electrochromic device according to the embodiment can be manufactured.

Figure 14 is a cross-sectional view showing an electrochromic device according to another embodiment.

The description of the previous embodiments may be referred to for explaining the electrochromic device according to the present embodiment, except for the changed parts.

Referring to FIG. 14, the electrochromic device according to the embodiment may further include a first barrier layer 1100 and a second barrier layer 1200.

The first barrier layer 1100 is disposed on the first sealing part 800. The first barrier layer 1100 is disposed on the first flat portion. The first barrier layer 1100 may be in close contact with the first sealing portion 800. The first barrier layer 1100 may be adhered to the first sealing portion 800.

The first barrier layer 1100 may protect the first sealing part 800 from external physical shock.

The first barrier layer 1100 includes the first transparent electrode 300, the first discoloring layer 500, the electrolyte layer 700, the second discoloring layer 600, and the second transparent electrode 400. ) can be protected from external moisture and/or oxygen. That is, the first barrier layer 1100 can reinforce the sealing characteristics of the first sealing part 800.

The first barrier layer 1100 may include a base film. The base film may include a polyester film, polyethylene film, polypropylene film, polyimide film, or polyamide film. Additionally, the first barrier layer 1100 may further include an organic layer and an inorganic layer alternately disposed on the base film.

The second barrier layer 1200 is disposed below the second sealing part 900. The second barrier layer 1200 is disposed below the second flat portion. The second barrier layer 1200 may be in close contact with the second flat portion. The second barrier layer 1200 may be adhered below the second flat portion.

The second barrier layer 1200 may protect the second sealing part 900 from external physical shock.

The second barrier layer 1200 includes the second transparent electrode 400, the second discoloration layer 600, the electrolyte layer 700, the first discoloration layer 500, and the first transparent electrode 300. ) can be protected from external moisture and/or oxygen. That is, the second barrier layer 1200 can reinforce the sealing characteristics of the second sealing part 900.

The second barrier layer 1200 may include a base film. The base film may include a polyester film, polyethylene film, polypropylene film, polyimide film, or polyamide film. Additionally, the second barrier layer 1200 may further include an organic layer and an inorganic layer alternately disposed on the base film.

The first barrier layer 1100 and the second barrier layer 1200 may have a water vapor transmission rate of about 1×10 g/m2·day or less. The first barrier layer 1100 and the second barrier layer 1200 may have a water vapor transmission rate of about 5 g/m2·day or less. The first barrier layer 1100 and the second barrier layer 1200 may have a moisture permeability of about 5×10 ^-1 g/m2·day or less. The first barrier layer 1100 and the second barrier layer 1200 may have a moisture permeability of about 1×10 ^-1 g/m2·day or less.

The first barrier layer 1100 and the second barrier layer 1200 are formed in the process of forming the first sealing part 800 and the second sealing part 900. It may be adhered to the second sealing portion 900. That is, the first barrier layer 1100 may come into close contact with the first sealing portion 800 during the process of curing the first curable resin. Additionally, the second barrier layer 1200 may be in close contact with the second sealing portion 900 during the process of curing the second curable resin.

Figure 15 is a cross-sectional view showing an electrochromic device according to another embodiment.

The description of the previous embodiments can be essentially combined with the description of the present embodiment, except for the changed parts.

Referring to FIG. 15 , the first sealing portion 800 further includes a first edge portion 840. The first edge portion 840 extends from the first body portion 810 and covers the first side of the first substrate 100 and the seventh side of the first transparent electrode 300.

That is, in the process of flattening the first curable resin composition 801, the first curable resin composition 801 flows to the first side 101 and hardens, forming the first edge portion 840. It can be.

The second sealing part 900 further includes a second edge part 940. The second edge portion 940 extends from the second body portion 910 and covers the fourth side 202 of the second substrate 200 and the eighth side of the second transparent electrode 400. .

That is, in the process of flattening the second curable resin composition 901, the second curable resin composition 901 flows up to the fourth side 202 and hardens, forming the second edge portion 940. It can be.

Since the first sealing portion 800 includes the first edge portion 840 and the second sealing portion 900 includes the second edge portion 940, the first sealing portion 800 ) and the second sealing portion 900 includes the first transparent electrode 300, the first discoloring layer 500, the electrolyte layer 700, the second discoloring layer 600, and the second transparent electrode. (400) can be effectively protected.

In addition, since the first sealing part 800 and the second sealing part 900 cover the first side 101 and the fourth side 202, respectively, the edge portion of the electrochromic device according to the embodiment The mechanical strength can be further strengthened.

The electrochromic device according to the embodiment is a first device in which the second substrate 200, the second transparent electrode 400, and the electrolyte layer 700 are removed, and the upper surface of the first transparent electrode 300 is opened. It includes a first sealing portion 800 disposed in the open area OA1.

Accordingly, the first sealing portion 800 is formed on the third side 201 of the second substrate 200, the side of the second transparent electrode 400, the side of the second color change layer 600, and the It may be disposed on the side of the electrolyte layer 700 and the side of the first discoloration layer 500 and adhered to the upper surface of the first transparent electrode 300. In addition, the first sealing portion 800 is formed on the third side 201 of the second substrate 200, the side of the second transparent electrode 400, the side of the second discoloration layer 600, and the electrolyte. It may be adhered to the side of the layer 700 and the side of the first discoloration layer 500. Additionally, the first sealing part 800 may also be adhered to a portion of the upper surface of the second substrate 200.

Accordingly, the first sealing part 800 can be placed over a large area and adhered to a large area. Accordingly, the first sealing portion 800 is formed on the upper surface of the first transparent electrode 300, the third side 201 of the second substrate 200, the side surface of the second transparent electrode 400, and the upper surface of the first transparent electrode 300. It can be firmly adhered to the side of the second discoloring layer 600, the side of the electrolyte layer 700, the side of the first discoloring layer 500, and a portion of the upper surface of the second substrate 200. In addition, the first sealing portion 800 is formed on the upper surface of the first transparent electrode 300, the third side 201 of the second substrate 200, the side surface of the second transparent electrode 400, and the third side surface 201 of the first transparent electrode 300. It can be firmly adhered to the side of the second discoloring layer 600, the side of the electrolyte layer 700, the side of the first discoloring layer 500, and a portion of the upper surface of the second substrate 200.

Accordingly, the first seal 800 can efficiently suppress oxygen and moisture penetrating from the side.

Likewise, the second sealing portion 900 is formed by removing the first substrate 100, the first transparent electrode 300, and the electrolyte layer 700, and the lower surface of the second transparent electrode 400 is opened. It can be placed in the second open area OA2.

In addition, the second sealing portion 900 is formed on the second side 102 of the first substrate 100, the side of the first transparent electrode 300, the side of the first discoloration layer 500, and the electrolyte. It may be adhered to the side of the layer 700 and the side of the second color change layer 600. Additionally, the second sealing part 900 may also be adhered to a portion of the lower surface of the first substrate 100.

Accordingly, the second seal 900 can efficiently suppress oxygen and moisture penetrating from the side.

Therefore, the electrochromic device according to the embodiment blocks the inflow of oxygen and moisture from the outside and efficiently protects the first color change layer 500, the electrolyte layer 700, and the second color change layer 600. You can.

Additionally, the first substrate 100 and the second substrate 200 are flexible, and the electrochromic device according to the embodiment can be bent. At this time, since the first sealing part 800 and the second sealing part 900 are strongly adhered to each side, the electrochromic device according to the embodiment has the first sealing part 800 and the second sealing part. It is possible to prevent peeling or opening of the part 900.

The electrochromic device according to the embodiment may have improved durability.

Additionally, the features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

Although the above description focuses on the examples, this is only an example and does not limit the present invention, and those skilled in the art will be able to You will see that various variations and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

First substrate (100)
Second substrate (200)
First transparent electrode (300)
Second transparent electrode (400)
First discoloration layer (500)
Second color change layer (600)
Electrolyte layer (700)
First seal (800)
Second seal (900)

Claims (12)

first substrate;
a first transparent electrode disposed on the first substrate;
a first discoloring layer disposed on the first transparent electrode;
An electrolyte layer disposed on the first discoloration layer;
a second discoloration layer disposed on the electrolyte layer;
a second transparent electrode disposed on the second discoloration layer;
a second substrate disposed on the second transparent electrode; and
It is disposed in a first open area between the third side of the second substrate and the first side of the first substrate, and is disposed on the upper surface of the first transparent electrode, the fifth side of the electrolyte layer, and the third side of the second substrate. An electrochromic device comprising a first seal covering a portion of a side surface and a top surface of the second substrate. The electrochromic device of claim 1, wherein the first sealing portion further includes a first flattening portion. The electrochromic device of claim 2, wherein the first sealing portion includes a first body portion disposed in the first open area and a first extension portion extending from the first body portion to the upper surface of the second substrate. 2. The method of claim 1, wherein the first substrate includes a third side opposite the first side,
the second substrate includes a fourth side opposite the third side,
A second open area is formed between the third side and the fourth side,
An electrochromic device further comprising a second sealing portion disposed in the second open area and covering a portion of the lower surface of the second transparent electrode, the sixth side of the electrolyte layer, the third side, and the lower surface of the first substrate. . The electrochromic device of claim 4, wherein the second sealing portion further includes a second flattening portion. The electrochromic device of claim 5, wherein the second sealing portion includes a second body portion disposed in the second open area and a second extension portion extending from the second body portion to the lower surface of the first substrate. The electrochromic device of claim 2, further comprising a first barrier layer disposed on the first planarization portion. The electrochromic device of claim 5, further comprising a second barrier layer disposed below the second planarization portion. The method of claim 1, further comprising a first bus bar electrically connected to the first transparent electrode layer,
The first sealing portion is an electrochromic element covering the first bus bar. The method of claim 4, further comprising a second bus bar electrically connected to the second transparent electrode layer,
The second sealing portion is an electrochromic element covering the second bus bar. forming a first transparent electrode on a first substrate;
forming a first discoloring layer on the first transparent electrode layer;
forming an electrolyte layer on the first discoloration layer;
forming a second transparent electrode on a second substrate;
forming a second discoloring layer on the second transparent electrode;
Disposing the second discoloring layer on the electrolyte layer, and laminating the second substrate, the second transparent electrode, and the second discoloring layer to the electrolyte layer;
forming a first open area by removing a portion of the second substrate, a portion of the second transparent electrode, a portion of the second discoloration layer, a portion of the electrolyte layer, and a portion of the first discoloration layer;
disposing a first curable resin in the first open area;
Planarizing the first curable resin; and
A method of manufacturing an electrochromic device comprising curing the first curable resin. The method of claim 11, wherein a portion of the first substrate, a portion of the first transparent electrode, a portion of the first discolored layer, a portion of the electrolyte layer, and a portion of the second discolored layer are removed to form a second open area. forming a;
disposing a second curable resin in the second open area;
planarizing the second curable resin; and
A method of manufacturing an electrochromic device further comprising curing the second curable resin.